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44 Cards in this Set
- Front
- Back
Which enzyme breaks a carbon-carbon bond in the Embdem-Myerhof Pathway?
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Aldolase
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What enzyme electronically rearranges bonds within a molecule and thereby generates new functional groups?
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Isomerase
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What is the most accurate determination of bacterial growth?
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Log of the number of viable bacteria over time
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What happens during the stationary phase of bacterial growth?
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The number of dividing and dying bacteria may equal
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To determine which of two substances the worst bacterial nutrient is, one would most likely:
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compare growth curves in presence of each substance
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During the lag phase of bacterial growth, bacterial cell mass and volume:
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Increase
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The number of viable bacterial cells increasing by 2-fold per unit, this time is called:
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Generation time
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Enzymes are catalysts because they:
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1) Optimally orient reactants
2) Lower energy of activation 3) Bring reactants closer together |
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The phosphotransferase system of E.coli is how this organism generates this substance in the cytoplasm
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Glucose-6- PO4
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In Peptidoglycan, the carboxyl group of lactic acid moiety is covalenty bound to:
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L-alanine
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Transpeptidase forms a peptide bond with an opposing strand's carboxyl group of:
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A terminal D-alanine
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Which pair of substances would not provide at least one substance necessary for the following reaction?
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NADH+ H+ and ATP
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Fatty acids are covalently attached to this substance in the Gram-positive bacterial plasma membrane
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Glycerol
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A multi-subunit enzyme alwasy exhibits
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Non-covalently interacting subunits
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Disruption of bacterial plasma membrane could affect:
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Electron Transport
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If L-lysine is present within peptidoglycan, the following amino acid is not present:
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Diaminopimelic acid
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Cytochrome proteins are an integral part of the bacterial?
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Plasma membrane
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Electron and energy-yielding process and the final electron acceptor is nitrate (NO3-) ion?
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Anaerobic respiration
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A nucleoside is composed of
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A purine or pyrimidine base with a sugar covalently attached
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For bacteria the number 70S refers to:
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The catalalytically active ribsome
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The transport of a substance against a concentration gradient across the plasma membrane
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Active Transport
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Small molecule diffusion across the outer membrane of Gram-negative bacteria depends upon:
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Porins
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An electron and energy-yielding process with the final electron acceptor being pyruvic acid
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Fermentation
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If bacterium could catabolize ATP to ADP to PO4 3- via ATP synthase, what result may occur?
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Production of proton motive force
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How is Proton Motive force established during electron transport and anaerobic respiration?
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H+ vectored outside the cell via the electron transport system proteins
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The conversion of nitrogen gas to ammonia is known as:
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Nitrogren fixation
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The outer membrane of Gram (-) bacteria has two leaflets, inner and outer, which respectively are:
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Inner= phospholipid
Outer= LPS |
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An endospore's core may be filled with:
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Dipicolinic acid
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The a-helix and b-pleated sheet structures are examples of protein
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Secondary structure
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The enzyme that reduces nitrogen gas to ammonia
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Nitrogenase
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What generic enzyme could theoretically perform the following reaction?
Glucose-6-PO4 Glyceraldehyde-3-PO4 + Pyruvate |
Aldolase
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The enzyme, triose isomerase, converts the following substance into Glyceraldehyde-3-PO4
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Dihydroxyacetone-PO4
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Of the ten steps in the Embden-Myerhof pathway, how many involve an oxidation/reduction reaction?
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1
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Of the ten steps in the Embden-Myerhof pathway, how many involve a kinase reaction?
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4
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Substrate-level phosphorylation involves?
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Conversion of ADP + PO4
= to ATP by any means other than oxidative phosphorylation |
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Which enzyme co-factor is re-generated during lactic acid formation in glycolysis?
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NAD+
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How many moles of CO2 per mole of Glucose are released in the Kreb's cycle, only?
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4
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A two-electron transfer with an overall Eo' of –0.316 volts could hypothetically lead to this number of
high-energy phosphate bonds. Go' = – [ nFEo'] and F = 23,063 cal/deg/mole equivalent |
0
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Chemotaxis by bacteria does not involve
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Recognition of concentration differences along length of cell
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What could increase the Proton Motive force in bacteria?
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A higher pH within the cytoplasm relative to the outside of the cell
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The most abundant protein within the Outer Membrane of Gram-negative bacteria – attaches OM to cell
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Braun's lipoprotein
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Hopanoids are:
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Cholesterol like structures
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Bacterial chemotaxis requires this bacterial structure
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Flagellum
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We did not discuss this bacterial secretion system
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Sec
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